a/c bianary switch hot wire color?

I'm installing a/c upgrade in my car, it comes with a cutout switch that needs to be wired from the bianary switch hot wire...but the damn instructions don't tell me which one...

what color is the hot wire on the bianary switch? If I choose the wrong one, then this safety feature won't work and I could blowup my stuff.

HELP! and yes I've check wiring diagrams, I know blk/yellow go to the computer I also have a pink/blue that go into the same area of the plug, and a separate purple wire. My car is a 93

here's a picture of the article done on this install...which also doesn't mention the color:
mmfp_0308_10_z+hose_wizard_air_conditioning_installl+kickout_switch.webp


Nicole